KR102702187B1 - CCTV camera cover of dom type - Google Patents

Abstract

The content posted is about a dome-shaped cover for CCTV with a reflection-blocking function to protect the camera lens from moisture or infrared light reflection due to temperature differences.
A dome-shaped cover for CCTV having a reflection blocking function according to one embodiment of the present specification
In a dome-shaped cover for CCTV for protecting a camera module inside and a plurality of infrared LEDs radially arranged around the camera module,
A first cover in the shape of a hemisphere having a cut-out formed at a position opposite to the lens portion of the camera module;
A second cover formed to have the same curvature as the first cover and replaceably connected to the cut portion, and having a coating layer of arbitrary color and thickness formed on the inner surface to satisfy a first condition of forming moisture on the surface due to a temperature difference, or a second condition of blocking the light source of the infrared LED from being diffusely reflected and entering the lens portion;
A shielding member interposed between the first cover and the second cover to fix the second cover is provided;
A dome-shaped cover for CCTV with a reflection blocking function is provided, characterized in that the second cover is selectively and replaceably connected to the first cover according to the first or second condition, so that the first cover is compatible.

Description

CCTV dome type cover with anti-reflection function {CCTV camera cover of dom type}

This specification relates to CCTV, and more specifically, to a dome-shaped cover for CCTV having a reflection-blocking function to protect the lens of a camera module from moisture caused by temperature difference or an infrared light source (infra-red LED).

Unless otherwise indicated herein, the materials described in this section are not prior art to the claims of this application and their inclusion in this section is not an admission that they are prior art.

In general, closed circuit television (CCTV) systems, which are closed circuit surveillance devices, are used in places such as houses, department stores, banks, spaces, and exhibition halls to prevent theft and easily check the operating status of machines and process flow.

This type of closed-circuit television is a type of television that transmits images to specific recipients, and the transmission and reception of images is connected by wires or wirelessly, preventing the general public other than the relevant recipients from receiving the images at will.

These CCTV cameras are mainly divided into box cameras with box-type housings used for outdoor use, and dome cameras used mostly for indoor use.

All of these CCTV cameras have a cover made of polycarbonate (PC) material with good transparency installed on the front of the camera lens to allow light from the subject to reach the camera lens and protect the camera from the external environment.

The aforementioned box camera is configured in a circular, square or oval plate shape depending on the housing shape, and the dome camera is configured in a hemispherical shape and also serves as a camera housing.

Camera covers for CCTV are made by injection molding PC into a specific shape, but the physical and optical properties of the PC are not good, which causes the camera's image quality to deteriorate.

The above PC reflects visible light and has an optical characteristic of reflecting infrared rays when irradiated with an infrared LED (IR LED), which reduces transmittance and causes a deterioration in camera image quality due to reflected light.

That is, there is a problem that infrared light emitted from an IR light source may be reflected and incident on a window (or lens), resulting in the capture of an imaginary image (the so-called ghosting phenomenon).

In addition, infrared surveillance cameras have the problem of not being able to capture clear images of subjects due to moisture forming on the surface of the transparent dome-shaped cover caused by the temperature difference between day and night.

Although not shown in the drawing, in the case of a dome-shaped cover for CCTV, a sponge or cloth is inserted between the camera lens and the infrared LED lighting means to block or reduce the reflected light so that infrared light reflects off the hemisphere and enters the camera lens. However, since the structure of the dome-shaped cover has a hemispherical shape, the blocked shape causes the infrared light (IR light source) to be concentrated toward the camera lens, which has the opposite effect and makes it difficult to block the reflected light.

A dome-shaped surveillance camera with a reflection blocking function is registered in the Republic of Korea Patent Publication No. 10-2001164 (July 17, 2019).

An embodiment of the present specification relates to a CCTV dome cover having an anti-reflective function, which can selectively and replaceably coat the inner surface of a split cover according to the purpose of blocking moisture formed on the surface of the dome cover due to a temperature difference, or anti-reflective reflection caused by infrared LED irradiation (AR; anti-reflecting coating).

An embodiment of the present specification relates to a dome-shaped cover for CCTV having a reflection blocking function, wherein a dome-shaped cover for protecting an infrared light source to which a split cover is interchangeably combined is interchangeable.

In order to achieve the above and other purposes of this specification, according to one embodiment of this specification,

In a dome-shaped cover for CCTV for protecting a camera module inside and a plurality of infrared LEDs radially arranged around the camera module,

A first cover in the shape of a hemisphere having a cut-out formed at a position opposite to the lens portion of the camera module;

A second cover formed to have the same curvature as the first cover and replaceably connected to the cut portion, and having a coating layer of arbitrary color and thickness formed on the inner surface to satisfy a first condition of forming moisture on the surface due to a temperature difference, or a second condition of blocking the light source of the infrared LED from being diffusely reflected and entering the lens portion;

A connecting member interposed between the first cover and the second cover to secure the second cover is provided;

A dome-shaped cover for CCTV with a reflection blocking function is provided, characterized in that the second cover is selectively and replaceably connected to the first cover according to the first or second condition, so that the first cover is compatible.

A dome-shaped cover for CCTV having a reflection blocking function according to an embodiment of the present specification having the above-described configuration has the following advantages.

Depending on the purpose, the inner side of the split cover that can be replaced and combined is coated to block moisture generated on the surface of the dome-shaped cover due to temperature difference or diffuse reflection caused by infrared LED irradiation, and the dome-shaped cover for protecting the infrared light source is made compatible, thereby reducing the cost.

In addition, it is possible to improve reliability by blocking the diffuse reflection caused by the infrared LED light to capture the best image (i.e., it is possible to prevent the image quality from deteriorating due to the ghosting phenomenon).

Figure 1 is a perspective view of a dome-shaped cover for CCTV having a reflection blocking function according to a preferred embodiment of the present specification.
Figure 2 is an exploded perspective view of a dome-shaped cover for CCTV with a reflection blocking function illustrated in Figure 1.
Figure 3 is a cross-sectional view of a dome-shaped cover for CCTV having a reflection blocking function as shown in Figure 1.
Figure 4 is a block diagram showing the state of use of the dome-shaped cover for CCTV with the anti-reflection function illustrated in Figure 1.
Figure 5 is a usage diagram of a dome-shaped cover for CCTV with a reflection blocking function illustrated in Figure 1.

Hereinafter, a dome-shaped cover for CCTV having a reflection blocking function according to a preferred embodiment of the present specification will be described in detail with reference to the attached drawings.

Referring to FIGS. 1 to 5, a dome-shaped cover for CCTV having a reflection blocking function according to one embodiment of the present specification is

In a dome-shaped cover for CCTV to protect a camera module inside and a plurality of infrared LEDs (infra-LEDs) arranged radially around the camera module,

A hemispherical first cover (30) having a cutout (20) formed at a position opposite to the lens portion (10a) of the camera module (10) (as an example, it may be injection-molded using a transparent polycarbonate (PC) material, but is not limited thereto);

A split second cover (60) having the same curvature as the first cover (30), formed separately from the first cover (30) and replaceably joined to the cut portion (20), and having a coating layer (50) of arbitrary color and thickness formed on the inner surface to meet the first condition of forming moisture on the surface due to the difference in internal and external temperatures, or the second condition of blocking the light source of the infrared LED (40) from being diffusely reflected and entering the lens portion (10a) of the camera module (10);

A shielding member (70) is provided between the first cover (30) and the second cover (60) to secure the second cover (60) to the first cover (30).

It is characterized in that the first cover (30) is made compatible by selectively and replaceably connecting the second cover (60) to the first cover (30) according to the first or second condition.

In a more preferred embodiment, the aforementioned shielding member (70)

It is characterized by being formed of a normal non-transparent silicone material to prevent the scattered light of the infrared LED (40) (IR LED) from being incident on the lens part (10a) of the camera module (10).

The shielding member (70) mentioned above

A wing-shaped fitting piece (80) formed of elastic material and symmetrically positioned on both sides to increase the mutual sealing force and fastening force of the first cover (30) and the second cover (60);

It is characterized by including a blocking projection (90) that protrudes upward and downward on the outer surface of the wing-shaped fitting piece (80) at the boundary between the first cover (30) and the second cover (60) and blocks the light of the infrared LED (40) from being reflected and entering the lens portion (10a).

When the second cover (60) is fixed to the first cover (30) described above by the shielding member (70), the edges of the first and second covers (30, 60) are forcibly fitted into the left and right symmetrical wing-shaped fitting pieces (80) of the shielding member (70) formed of an elastic material, and thus, by the mutual close contact between the elastic wing-shaped fitting pieces (80) and the first and second covers (30, 60), it is possible to prevent rainwater or foreign substances such as dust from penetrating into the dome-shaped cover (110) through the gap between the first and second covers (30, 60) and the shielding member (70).

The unexplained symbol 100 in the drawing is a body that is mounted on the wall or ceiling of a building where CCTV is installed and supports the first cover (30).

Hereinafter, a dome-shaped cover for CCTV having a reflection blocking function according to one embodiment of the present specification is described with reference to the attached drawings.

As shown in FIGS. 1 to 5, the technical contents of the dome-shaped surveillance camera, which includes a camera module (10) (which may include a lens unit (10a), an imaging element (10b), and an image processing unit (10c) that are rotatably mounted on a conventional camera module (10) and capable of adjusting a shooting area of a subject) accommodated in the aforementioned dome-shaped cover (110) and a plurality of infrared LEDs (40) arranged radially around the camera module (10), and which is installed at a predetermined location in an outdoor or indoor blind spot of a public facility (school, residential area, hospital, etc.), a public transportation vehicle, etc. for security, crime prevention, or safety purposes, and which can capture an image of a subject by the camera module (10) by irradiating the infrared LED (40) light, are substantially the same as those commonly used in the technical field to which this specification pertains, and therefore a detailed description of their configuration and operation will be omitted.

Therefore, according to the CCTV dome-shaped cover having a reflection blocking function according to one embodiment of the present specification, depending on the environment of the place where the dome-shaped surveillance camera is installed, a second cover (60) that is dividedly formed on the dome-shaped first cover (30) and has a coating layer (50) of an arbitrary color and thickness formed on the inner surface in the cut portion (20) of the first cover (30) can be selectively and replaceably combined.

To explain this in detail, when the dome-shaped surveillance camera is installed and used in an environment of the first condition in which moisture may form on the surface of the dome-shaped cover (110) due to the temperature difference between the inside and outside of the dome-shaped cover (110) (when installed outdoors), a second cover (60) having a conventional coating layer (50) (or a film layer may be used) having a predetermined color (for example, black may be used) and thickness (for example, may be formed to be 50 Å or more) formed on the inner surface so as to exhibit a conventional anti-fog function may be joined to the cut portion (20) of the first cover (30) by the shielding member (70).

Meanwhile, when the dome-type surveillance camera is installed and used in a second condition environment (especially, when installed in a dark place, the image quality may deteriorate due to ghosting and virtual image shooting), in which the light of the infrared LED (40) may be reflected and incident on the lens unit (10a) of the camera module (10), a conventional coating layer (50) having a predetermined color (for example, black may be used) and thickness (for example, may be formed to be 50 Å or more) is formed on the inner surface of the second-1 cover (60A) so as to be able to exhibit the function of eliminating virtual image shooting due to the diffuse reflection of the light of the conventional infrared LED (40), and can be joined to the cut-out portion (20) of the first cover (30) by the shielding member (70).

At this time, since the aforementioned shielding member (70) is formed of an opaque silicone material, it is possible to prevent the diffusely reflected light of the infrared LED (40) (IR LED) from being incident on the lens portion (10a) of the camera module (10). That is, the light of the infrared LED (40) passes through the infrared lens (not shown) and the dome-shaped cover (110) in sequence to irradiate the area around the subject (photographing area).

In addition, the diffusely reflected light of the aforementioned infrared LED (40) (IR LED) can be blocked from entering the lens section (10a) of the camera module (10) by a blocking projection (90) that protrudes vertically on the outer surface of the shielding member (70).

Meanwhile, the coating layer (50) (so-called AR; anti-reflection coating; thin film layer) formed on the inner surface of the 2-1 cover (60A) described above is formed as a conventional AR thin film layer (for example, it can be formed using an organic silicon compound or a fluorine-based coating solution, and can be formed by coating using a spray method, a dipping method, a spin method, etc., but it is not meant to be limited thereto) on the inner surface of the 2-1 cover (60A) injection-molded with a transparent PC material, thereby preventing virtual image shooting of the subject due to diffuse reflection of the infrared LED (40) (i.e., it can prevent deterioration of the image quality due to reflected light of the infrared LED (40).)

According to the CCTV dome-shaped cover having a reflection blocking function according to one embodiment of the present specification as described above,

When a dome-shaped surveillance camera is installed and used in a place where moisture is formed on the surface of the dome-shaped cover (110) due to a temperature difference, a second cover (60) that is dividedly formed on the dome-shaped first cover (30) and has a coating layer (50) of an arbitrary color and thickness formed on the inner surface of the cut portion (20) of the first cover (30) can be selectively and replaceably combined for use.

In addition, when the dome-shaped surveillance camera is installed and used in a second condition environment (in particular, when installed in a dark place, the image quality may deteriorate due to ghosting and virtual image shooting) in which the light of the infrared LED (40) may be reflected and incident on the lens portion (10a) of the camera module (10), a second-first cover (60A) having a coating layer (50) of a predetermined color and thickness formed on the inner surface of the cut portion (20) of the first cover (30) can be selectively and replaceably combined.

Accordingly, when removing moisture formed by temperature difference on the surface of the dome-shaped cover (110) depending on the location (environment) where the dome-shaped surveillance camera is installed, or when blocking light from the infrared LED (40) from being reflected and entering the lens section (10a) of the camera module (10), the dome-shaped first cover (30) is made compatible by selectively and replaceably combining the second cover (60) or the second-first cover (60A) to the cut section (20) of the dome-shaped first cover (30).

In addition, the cost can be reduced by forming a coating on the inner surface of the second cover (60) or the second-first cover (60A) that is optionally and replaceably connected to the cut portion (20) of the above-mentioned dome-shaped first cover (30) (at this time, the inner surface of the first cover (30) that is formed with a relatively large area is not formed with a coating).

Although the above-described specification has been described with reference to exemplary embodiments of the present invention, it will be apparent to those skilled in the art that various modifications and equivalent other embodiments may be made without departing from the essential characteristics of the specification.

Accordingly, the embodiments disclosed in this specification are not intended to limit the technical idea but to explain it, and the protection scope of the specification should be interpreted by the technical idea of the claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of rights of this specification.

10; camera module
20; incision
30; 1st cover
40; Infrared LED
50; coating layer
60; 2nd cover
70; shielding material
80; Winged insert
90; Blocking protrusion
100; body
110; Dome Cover
120; Control Unit

Claims (3)

In a dome-shaped cover for CCTV for protecting a camera module inside and a plurality of infrared LEDs radially arranged around the camera module,
A first cover having a hemispherical shape in which a cutout is formed at a position opposite to the lens of the camera module;
A second cover formed to have the same curvature as the first cover and replaceably connected to the cut portion, and having a coating layer of arbitrary color and thickness formed on the inner surface to satisfy a first condition of forming moisture on the surface due to a temperature difference, or a second condition of blocking the light source of the infrared LED from being diffusely reflected and entering the lens portion;
A shielding member interposed between the first cover and the second cover to fix the second cover is provided;
The second cover is selectively and interchangeably connected to the first cover according to the first or second condition, so that the first cover is compatible,
The above shielding material
A dome-shaped cover for CCTV having a diffuse reflection blocking function, characterized by including: a wing-shaped fitting piece formed of an elastic material to increase the mutual sealing force and fastening force of the first cover and the second cover; and a blocking projection formed to protrude upward and downward on the outer surface of the wing-shaped fitting piece at the boundary between the first cover and the second cover and to block diffuse reflection of the infrared LED. In the first paragraph,
The above shielding material
A dome-shaped cover for CCTV with a reflection-blocking function, characterized in that it is formed of an opaque silicone material to prevent light from the infrared LED from entering the lens section. delete

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